Rolling-mill



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J. FAWBLL & J. HEMPHILL' ROLLING MILL.

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' STATES PATENT Enron.

JOSEPH FAWELL AND JAMES HEMPHILL, OF PITTSBURG, PENNSYLVANIA.

ROLLING-MILL- SPECIFICATION forming part of Letters Patent No. 525,263,dated August 28, 1894.

Application filed April 17, 1891- Serial No. 389,343. (No model.)

To all whom it mayconccrn:

Be it known that we, JOSEPH FAWELL, a subject of the Queen of GreatBritain, and JAMES HEMPHILL, a citizen of the United States, residing atPittsburg, in the county of Allegheny and State of Pennsylvania, haveinvented or discovered certain new and useful Improvements inRolling-Mills, of which improvements the following is a specification.

The invention described herein relates to certain improvements inrolling mills, especially adapted for the reduction of heavy pieces ofiron or steel, and the invention has for its object certain improvementsin the construction and arrangement of the parts of the mill, wherebythe same is adapted for a wider range of operations.

In general terms theinvention consists in the construction andcombination all as more fully hereinafter described and claimed.

In the accompanying drawings forming a.

part of this specification, Figure 1 is a plan view of our improvedmill.

Figs. 2 and 3 are similar views showing certain modifications in thearrangement of the driving mechanism. Fig.4 is a plan view of the millproper on an enlarged scale. Fig. 5 is an end elevation of the mill.Fig. dis a sectional elevation, the plane of section being indicated bythe line 00, 00, Fig. 5. Fig. 7 is a similar view, the plane of sectionbeing indicated by the line y, y, Fig. 6. Fig. 8 is a sectional planview, the plane of section being indicated by the line z, 2, Fig. 6, andFig. 9 is a view of rolls employed in rolling I beams.

The housings 1, which may be formed either as integral structures or insections securely bolted together, have two windows or openings 2 forthe reception of the journal boxes 3, 3 of the upper rolls 4 and 6, andthe boxes 5, 5 of the lower rolls 4 and 6. The upper rolls 4 and 6 areadjusted toward and from the lower rolls by means of screws 7 7? passingthrough threaded openings in the housings, the rolls 4 and 6 being heldagainst the lower ends of the screws 7 7 by rods 39 connected at theirlower ends to weighted levers, as in the usual practice. Around each ofthe screws is placed a worm wheel 8, through which the screws can movelongitudinally, but are locked to the screws by a spline'andfeather, sothat the screws will rotate with and 5. These shafts connect the wormsengaging the wheels for operating the screws I at opposite ends of thesame roll, and on each of the shafts are loosely mounted the belt wheels12, adapted to be driven in opposite directions, and to be alternatelylocked to the shafts by means of a suitable clutch mechanism indicatedat 13. It will be understood that the rolls 4 and 6 are verticallyadjusted independent of each other, so that one set of the horizontalrolls may remain idle while the other is in operation, if desired. Thehousings are made 'of a sufficient width to permit of the two pairs orsets of rolls 4 and. 6 being arranged such a distance apart thatvertical or edging rolls 14, 14 may be placed between them. The journalsof these edging rolls are mounted in suitable boxes 15, secured as showninFig. 6 to carrier frames or plates 1 6, 16*, arranged between suitableguide bars 17, 17 secured to the housings. The carriers 16, 16*, aresupported by means of ribs 18 formed thereon, engaging the upper edgesof the guide bars 17,-17". The upper guide bars are bolted to bracketsor shelves 19 formed on the inner faces of the housings, and the ends ofthe lower guide bars rest in suitable recesses formed near the lowerends of the housings, as shown in Figs. 6 and 7. The

carriers with the rolls are adjusted toward 7 and from each other by thescrews 19, pass-- ing through threaded sleeves 20 in the housings. Aworm wheel 21 is mounted oneach of the'screws 19, and is connectedthereto by a spline or feather so as to permit of thelongitudinalmovement of the screw through the worm, while rotating therewith. Theworm the horizontal rolls as shown in Figs. 4 and 7.

windows or openings in the housings by reon the adjacent ends of theshafts 23, 23 By the rotation of the screws 19 the carriers 16, 16 areadjusted toward and from each other, they being held againsttheinnerends of the screws and drawn out as the latter are turned out bythe fluid pressure cylinders 29, arranged in the housings and providedwith suitable pistons, whose rods 30 are connected to the carriers. Byconnecting the cylinders at a point between their inner ends and thepistons, with an accumulator or other constant source of fluid pressuresupply, the carriers will be held firmly against the screws and willmove in or out asthe screws are adjusted.

In order to properly guide the ingot so that it will pass between thevertical or edging rolls, adjustable guide plates 42 having outwardlycurved ends, are secured to or formed integral with blocks 31, which areprovided with dovetail projections 32 fitting in correspondingly shapedgrooves in bars 33. These bars are secured to the housings outside ofThe blocks or guide plates are attached to the inner ends of screws 34passing through threaded nuts in the housings, and rotated by beveledpinions 35 keyed to the screws, but permitting their longitudinalmovement through them. The pinions 35 are rotated by correspondinglyshaped pinions on shafts 36 on which are keyed bevel gears 28hereinbefore referred to as transmitting motion from the shafts 23 tothe shafts 23. By thus conmeeting the gearing for rotating the screws 19and that for adjusting the screws 34, equal and correspondingadjustments of the vertical rolls and the guide plates is effected.Pulleys 37 are loosely mounted on the power shaft 26, employed as statedfor rotating the shafts 23, and these pulleys are rotated in oppositedirections by suitably arranged belts, and are adapted to be alternatelylocked to the shaft 26 for rotating the same, by any suitable clutchmechanism as indicated at 38 in Figs. 4 and 6.

As shown in Figs. 5 and 8, the journal boxes of the horizontal rolls areheld in the movable keys 40, which engage suitably shaped grooves in thesides of the boxes and of the openings in the housings. These keys arepassed down through the tops of the housings into the grooves in theboxes and housings, and are provided with eyes at their upper ends tofacilitate their withdrawal. This construction permits of the withdrawaloutwardly of the journal boxes when it is desired to remove the rolls.

As shown in Figs. 1 and 2, each pair or set of horizontal rolls isdriven by independent reversing engines A and B, connected to the 1power shafts 41. Each power shaft is connected by the usual or anysuitable system of gearing and couplings with its respective set or pairof horizontal rolls, so that each set or pair is independent as regardsits opfluid pressure mechanism H.

In operating the mill, the upper rolls on the side at which the ingotenters are adjusted to effect the required draft or reduction, on theupper and lower faces of the ingot. The vertical rolls are also adjustedto effect the required reduction on the sides of the ingot,

and the upper roll on the egress side of the mill is also adjusted. Theingot is then fed to the first pair of horizontal rolls, the plates 42guiding it into proper transverse position. By the action of the firstpair of horizontal rolls the ingot is forced between the vertical rolls,which are driven by frictional contact with the ingot. When the ingothas entered between the last pair of horizontal rolls,it will be pushedby the first pair and pulled by the second pair of horizontal rolls, thelatter being driven at a speed higher than that of the first pairproportional to the elongation of the ingot efiected by the first pairof horizontal rolls, and the vertical rolls. After the ingot has passedthrough in one direction, the mill is reversed, and the above operationsrepeated, both pairs of horizontal and the vertical rolls with theirguides being properly adjusted.

In Fig. 3 is shown an adaptation of the present invention as regards oneof its principal characteristics, 11. e., independently driven pairs ofrolls arranged in a common line of feed or with their axes parallel, forthe production of plates or sheets. When the mill is employed forrolling plates or sheets, the vertical or edging rolls with their guideplates are omitted, and one set or pair of rolls is used exclusively forroughing down the ingots to approximately the thicknessdesired and theother set or pair of horizontal rolls is used during the finishingoperation.

It has been the practice heretofore to either employ the same set ofrolls both for breaking down and finishing, or else to employ two millsarranged in line with each other, driven simultaneously by the sameengine or engines and each provided with suitable feed tables. The useof one mill or set of rolls for both operations is objectionable, as therolls soon become untrue or grooved by reason of their use in roughingdown, and require very frequentturningdownordressing. Theotherconstruction is objectionable not only on account of the cost of twomills with their feed tables, but also on account of the necessity ofdriving a pair of rolls, and the rollers of their feed tables.

ITO

The. advantages accruing from the use of our improved millwill bereadily apparent to those skilled in the art. During the roughing downoperation the upper one of the pair of rolls designed to be employed infinishing is raised up, so as not to come in contact with the ingot, andthe driving engine of said pair of rolls remains idle. As soon as theroughing down operation is finished the upper one of the roughing rollsis raised and their engine stopped, and the finishing rolls brought intooperation. This construction of mill permits of the use of the same feedtables for both operations, the two pairs of rolls being arranged insuch relation to each other and to the feed tables, that the ingot orplate can be fed and delivered past or through the rolls adjusted fornon-use to and from the pair in operation, thereby avoiding thetransference of the piece from one mill or set of rolls to another, andobviating the necessity of frequent dressing of the rolls. While it ispreferred to employ one set or pair of rolls for roughing down and theother pair as finishing rolls, both pairs may be used for roughing down,and one or both pairs for finishing the plates.

In Fig. 9 is shown a construction and arrangement of rolls for breakingdown ingots to or approximately to shape of I-beams. When the mill isdesigned to be used for such purpose, the horizontal rolls of both pairsare provided with grooves and collars suitably shaped tor reducing thesides ofthe ingot to the desired contour while the vertical rolls aremade plain so as to preserve the shape of the edges of the beam. Byforming grooves and collars, in accordance with rules well known in theart, other structural shapes can be readily rolled in ourimproved mill.In this construction of mill, i. a, one having two independently drivenpairs of rolls, the ingot or other article operated on serves asaregulator or equalizer of the relative speeds of the two pairs or setof rolls. As for example, if one pair of rolls is operating at a lowerspeed than the other, for any cause, the push or pull exerted by themore rapidly operating rolls on the ingot or other article will betransmitted to the slower rolls, increasing the speed thereof, while the.speed of the faster rolls is reduced, thus equalizing the rate or speedof both rolls.

We are aware that rolling mills have been constructed with two pairs orsets of rolls arranged in a common line of feed, and capable when thearticle being rolled has been considerably extended, of beingsimultaneously operative on such article, the rolls being driven byindependent mechanism. In such mills, however, the several sets of rollsare driven continuously in the same direction, and the driving mechanismis provided with a fly wheel or other momentum device, so that inpassing an article through such rolls, said article within the bite ofthe two sets of rolls could not have any immediate regulating actionupon either set of rolls. a mill supposing the pair of rolls lastoperative upon the article should be driven at a In such I higher speedthan the first pair of rolls, the

and wherein no momentum device such as a fly wheel is employed, anyincrease or decrease of the load will be immediately felt and operativeupon the rolls and the driving mechanism.

We claim herein as our invention- A 1. In a rolling mill the combinationof two pairs of two high reversible rolls arranged in a common line offeed, a separate or independent reversing engine for driving each suchpair of rolls and in either direction, a reversible feed and receivingtable outside each such pair of rolls, adjusting mechanism wherebyeither pair of rolls may be thrown intoor out of use at pleasure, eachpair of rolls being arrangedin convenient proximity to the other pairandto the delivery and receiving table of such other pair, wherebyeitherrfeed table may deliver to or receive from either pair of rollsand either pair of rolls may receive from or deliver to eitherfeed tableor the other pair of rolls, substantiallyas set forth.

2. In a rolling mill, the combination of two independently driven andreversible pairs or sets of horizontal rolls, arranged in a common lineof feed, a pair of vertical or edging rolls arranged between the pairsof horizontal rolls and guide plates arranged outside of. the hori-.zontal rolls for so directing the ingot or other article between thehorizontal rolls thatit will pass between the vertical rolls,substantially as set forth. I

3. In a rolling mill, the combination of two independently driven andreversible pairs or sets of horizontal rolls arranged in a common lineof feed, a pair of vertical or edging rolls arranged between the pairsof horizontal rolls, guide plates arranged outside of the horizontalrolls for so directing the ingot or other article between the horizontalrolls that it will pass between the vertical rolls, and mechanism forsimultaneously adjusting the vertical rollsand the guide plates,substantially as set forth.

4. In a rolling mill, the combination of either direction independent ofany momenperforming both functions, simultaneously, turn device, suchpairs of rolls being arranged substantially as set forth. in convenientproximity to each other In testimony whereof we have hereunto setwhell'leby to be operative both at the same time our hands.- 5 on t esame ingot or other article passing therethrough and whereby such ingotor other article being engaged by both pairs of rolls may regulate therelative speeds of such pairs Witnesses: of rolls by accelerating thespeed of one pair DARWIN S. WOLGOTT,

10 or retarding the speed of the other pair, or R. H. WHITTLESEY.

